A common trick with card readers is to run dollar bills through them. The cotton in the bills will likely clean the surface of the reader. This frequently allows them to work first time.
youre pulling my leg
This was an old timer's trick for cleaning sticky pads on a sax. It works. Most paper will also, but the cloth-like nature of bills makes them more effective.
Serious. They actually have cotton in them. They are lightly abrasive from the pulp and can clean the surface. Some ipa on the bill can also be used to assist in cleaning.
If it doesn't work, the issue isn't debris on the reader head.
ipa? as in beer?
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